package cn.jiahua.test10;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

public class Test {

    public static void main(String[] args) {
        Map<String,String> map =new ConcurrentHashMap<>();
        for (int i=0;i<100;i++){
            new Thread(()->{
                map.put(Thread.currentThread().getName(),UUID.randomUUID().toString().substring(0,5));
                System.out.println(map);
            },String.valueOf(i)).start();
        };
    }
}
